In the first incident, he said there were three people at home when the bomb smashed through a window, he said.

"There was no fire internally but the potential for huge damage and loss of life was there," the detective said.

Hours later, another home with a family of six at home was targeted, the report said. It struck a wall and burned a fence and patio furniture. One of the house's occupants, 29-year-old anti-racism activist Bonnie Collins said her work in standing up to white supremacists provoked the attack.

She said white-supremacist groups in the city have become more active and belligerent lately and have a rally planned for March 21, a demonstration she vowed to protest.

"They're getting stronger, they're showing their flags," she told the Sun. "There's a lot of kids drawn to it -- they're looking for something and they find acceptance with these groups."